LM2575N-ADJ National Semiconductor, LM2575N-ADJ Datasheet - Page 16
LM2575N-ADJ
Manufacturer Part Number
LM2575N-ADJ
Description
Voltage Regulator IC
Manufacturer
National Semiconductor
Datasheet
1.LM2575N-ADJ.pdf
(28 pages)
Specifications of LM2575N-ADJ
No. Of Pins
16
Peak Reflow Compatible (260 C)
No
Supply Voltage Max
40V
Leaded Process Compatible
No
Package / Case
16-DIP
Output Current Max
1A
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2575N-ADJ
Manufacturer:
NS
Quantity:
6 221
www.national.com
4. Catch Diode Selection (D1)
A. The catch-diode current rating must be at least 1.2 times greater
than the maximum load current. Also, if the power supply design
must withstand a continuous output short, the diode should have a
current rating equal to the maximum current limit of the LM2575.
The most stressful condition for this diode is an overload or shorted
output. See diode selection guide in Figure 8.
B. The reverse voltage rating of the diode should be at least 1.25
times the maximum input voltage.
5. Input Capacitor (C
An aluminum or tantalum electrolytic bypass capacitor located
close to the regulator is needed for stable operation.
To further simplify the buck regulator design procedure, National Semiconductor is making available computer design software to
be used with the Simple Switcher line of switching regulators. Switchers Made Simple (version 3.3) is available on a (3½ ) diskette
for IBM compatible computers from a National Semiconductor sales office in your area.
PROCEDURE (Adjustable Output Voltage Versions)
IN
)
16
4. Catch Diode Selection (D1)
A. For this example, a 3A current rating is adequate.
B. Use a 40V MBR340 or 31DQ04 Schottky diode, or any of the
suggested fast-recovery diodes in Figure 8.
5. Input Capacitor (C
A 100 μF aluminum electrolytic capacitor located near the input and
ground pins provides sufficient bypassing.
EXAMPLE (Adjustable Output Voltage Versions)
IN
)